https://bugs.kde.org/show_bug.cgi?id=497999
Bug ID: 497999
Summary: Incremental archives have zero length files
Classification: Applications
Product: kbackup
Version: 24.12.0
Platform: Neon
OS: Linux
Status: REPORTED
Severity: critical
Priority: NOR
Component: general
Assignee: kol...@aon.at
Reporter: jpha...@gmail.com
Target Milestone: ---
Created attachment 176935
--> https://bugs.kde.org/attachment.cgi?id=176935&action=edit
screenshot of tar file beside the _inc tar file
SUMMARY
Incremental backup archives contain mostly zero size files. Full backups seem
fine.
I have a simple backup strategy.... i use kbackup to copy a local disk (home
and virtual machines, etc) to another disk on the same machine. The source
data is quite large - 2.6Tb. The receiving disk is a 10Tb unit, used only for
local backups.
STEPS TO REPRODUCE
1. Back up a local drive to another local drive. Use an incremental backup
with a full backup every 7 days.
2. Set up a cron job to run the kbackup profile daily at 01:00am.
3. Let it run for a few days...all appears well. I see a full backup on the
start date, and _inc archives every day
4. Now inspect the _inc files
OBSERVED RESULT
The _inc files contain a large number of zero length files. The full backups
dare OK.
EXPECTED RESULT
The _inc files hould contain only changed files, but with the correct file
sizes
SOFTWARE/OS VERSIONS
Operating System: KDE neon 6.2
KDE Plasma Version: 6.2.4
KDE Frameworks Version: 6.9.0
Qt Version: 6.8.1
Kernel Version: 6.8.0-51-generic (64-bit)
Graphics Platform: Wayland
Processors: 24 × AMD Ryzen 9 3900X 12-Core Processor
Memory: 125.7 GiB of RAM
Graphics Processor: AMD Radeon RX 6600
Manufacturer: ASUS
ADDITIONAL INFORMATION
$ tar --version
tar (GNU tar) 1.35
Copyright (C) 2023 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Written by John Gilmore and Jay Fenlason.
====================================================
This is a serious problem, as zero length files will overwrite the real files
if a restore is attempted. See attachment for a side by side view of a test
tar file, and the _inc kbackup file.
ALL the _inc files I have seen so far have the same problem
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